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Ecology chapter 3
Vocab words chapter 3
| Term | Definition |
|---|---|
| Chapter 3 | Lesson 1 |
| natural resources | Anything naturally occurring in the environment that humans use. |
| pollution | Contamination of the Earth's land, water, or air. |
| nonpoint source | A widely spread source of pollution that is difficult to link to a specific point of origin. |
| point source | Specific source of pollution that can be identified. |
| environmental science | The study of the natural process that occurs in the environment and how humans affect that. |
| Chapter 3 | Lesson 2 |
| Renewable resource | A resource that is either always available or is naturally replaced in a relatively short time. |
| sustainable use | The use of a resource in ways that maintain the resource at a certain period of time. |
| nonrenewable resource | A natural resource that is not replaced in a useful time frame |
| ecological footprint | The amount of land and water that individuals use to meet their resource needs and to absorb the wastes that they produce |
| conservation | The practice of using less of a resource so that it can last longer |
| Chapter 3 | Lesson 3 |
| Exponential growth | Growth patterns in which individuals in a population reproduce at a constant rate, so that the larger population gets, the faster it grows |
| Chapter 3 | Lesson 4 |
| Clear cutting | The process of cutting down all the trees in an area at once |
| selective cutting | The process of cutting down only some tree species in an area |
| sustainable yield | An amount of a renewable resource that can be harvested regularly without reducing the future supply. |
| fishery | An area with a large population of valuable ocean organisms |
| aquaculture | The practice of raising fish and other water-dwelling organisms for food. |
| Chapter 3 | Lesson 5 |
| Biodiversity | The total number of different species on earth including those on land in the water and in the air. |
| Keystone species | A species that influences the survival of many other species in an ecosystem. |
| gene | A sequence of DNA that determines a trait and is passed from parent to offspring. |
| extinction | The disappearance of all members of a species on earth. |
| endangered species | A species in danger of becoming extinct in the near future. |
| threatened species | A species that could become endangered in the near future. |
| habitat destruction | The loss of a natural habitat. |
| habitat fragmentation | The breaking into a habitat into smaller, isolated pieces. |
| poaching | Illegal killing or removal of wildlife from their habitat . |
| captive breeding | The mating of animals in a zoo or wildlife preserves . |
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arw201198622
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